Fascinating attachment strategy of protococcidian
Eleutheroschizon duboscqi

a 2013

Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi

VALIGUROVÁ, Andrea, Andrei DIAKIN, Gita PASKEROVA a Timur G. SIMDYANOV

Základní údaje

Originální název

Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi

Autoři

VALIGUROVÁ, Andrea (703 Slovensko, garant, domácí), Andrei DIAKIN (643 Rusko, domácí), Gita PASKEROVA (643 Rusko) a Timur G. SIMDYANOV (643 Rusko)

Vydání

ECIP workshop 2013, 2013

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/13:00066897

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Attachement strategy; Apicomplexa; Protococcidia

Změněno: 13. 2. 2014 16:06, doc. RNDr. Andrea Bardůnek Valigurová, Ph.D.

Anotace

V originále

Apicomplexa represent very successful group of unicellular parasites that evolved unique adaptations for invading and surviving within their hosts. It is assumed that ancestral apicomplexans parasitized marine annelids, and their adaptation to the parasitic life style and further radiation took place before the era of vertebrates. First they spread to other marine invertebrates, then to freshwater and terrestrial invertebrates, and finally to vertebrates. Their zoite exhibits a high degree of polarity in that it has an apical pole equipped with a unique complex, comprising specialized secretory organelles, polar rings, and a conoid. This invasion apparatus traditionally used as the best defining feature for phylum Apicomplexa, can be also found in other Myzozoa - a group comprising apicomplexans, dinoflagellates, and several lineages of free-living predatory or parasitic flagellates that employ a myzocytosis-based mode of feeding. Apicomplexan evolution most likely progressed from myzocytotic predation to myzocytotic extracellular parasitism (e.g. gregarines, cryptosporidia), and finally to intracellular parasitism typical for coccidians. This study focuses on attachment strategy of protococcidian Eleutheroschizon duboscqi, a representative of marine deep-branching apicomplexans restricted to invertebrates, which shares features of both the gregarines and coccidians. Littoral samples of host polychaete Scoloplos (Scoloplos) armiger were collected at the Nikolai Pertsov White Sea Biological Station of MSU (Velikaya Salma, Kandalaksha). When attached to the host cell, parasite is covered by a parasitophorous sac resembling that of cryptosporidia, while its attachment site conspicuously resembles gregarine epimerite. The attachment apparatus consists of several short and thick projections arranged in circle, surrounded by another circle of filamentous fascicles. No organelles of apical complex were observed.

Návaznosti

GBP505/12/G112, projekt VaV

Název: ECIP - Evropské centrum ichtyoparazitologie

Investor: Grantová agentura ČR, ECIP - Evropské centrum ichtyoparazitologie

Citovat

VALIGUROVÁ, Andrea, Andrei DIAKIN, Gita PASKEROVA a Timur G. SIMDYANOV. Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi. In ECIP workshop 2013. 2013.

@proceedings{1165236,
   author = {Valigurová, Andrea and Diakin, Andrei and Paskerova, Gita and Simdyanov, Timur G.},
   booktitle = {ECIP workshop 2013},
   keywords = {Attachement strategy; Apicomplexa; Protococcidia},
   language = {eng},
   title = {Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi},
   year = {2013}
}

TY  - CONF
ID  - 1165236
AU  - Valigurová, Andrea - Diakin, Andrei - Paskerova, Gita - Simdyanov, Timur G.
PY  - 2013
TI  - Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi
KW  - Attachement strategy
KW  - Apicomplexa
KW  - Protococcidia
N2  - Apicomplexa represent very successful group of unicellular parasites that evolved unique adaptations for invading and surviving within their hosts. It is assumed that ancestral apicomplexans parasitized marine annelids, and their adaptation to the parasitic life style and further radiation took place before the era of vertebrates. First they spread to other marine invertebrates, then to freshwater and terrestrial invertebrates, and finally to vertebrates. Their zoite exhibits a high degree of polarity in that it has an apical pole equipped with a unique complex, comprising specialized secretory organelles, polar rings, and a conoid. This invasion apparatus traditionally used as the best defining feature for phylum Apicomplexa, can be also found in other Myzozoa - a group comprising apicomplexans, dinoflagellates, and several lineages of free-living predatory or parasitic flagellates that employ a myzocytosis-based mode of feeding. Apicomplexan evolution most likely progressed from myzocytotic predation to myzocytotic extracellular parasitism (e.g. gregarines, cryptosporidia), and finally to intracellular parasitism typical for coccidians. This study focuses on attachment strategy of protococcidian Eleutheroschizon duboscqi, a representative of marine deep-branching apicomplexans restricted to invertebrates, which shares features of both the gregarines and coccidians. Littoral samples of host polychaete Scoloplos (Scoloplos) armiger were collected at the Nikolai Pertsov White Sea Biological Station of MSU (Velikaya Salma, Kandalaksha). When attached to the host cell, parasite is covered by a parasitophorous sac resembling that of cryptosporidia, while its attachment site conspicuously resembles gregarine epimerite. The attachment apparatus consists of several short and thick projections arranged in circle, surrounded by another circle of filamentous fascicles. No organelles of apical complex were observed.
ER  -

VALIGUROVÁ, Andrea, Andrei DIAKIN, Gita PASKEROVA a Timur G. SIMDYANOV. Fascinating attachment strategy of protococcidian Eleutheroschizon duboscqi. In \textit{ECIP workshop 2013}. 2013.

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